Message Sensor can't detect/receive message
In the first screen shoot, I have a Keyboard 
sensor, on the object ground plane, send a message to all objects (the empty To field) with a Subject of somthing (with the misspelling).

Drag the images to a new tab to enlarge them.


In the second screen shoot, Now on the object human. There is a message sensor listening for a message with the subject somthing. When it receives a message (from any object) with the subject somthing the connected action actuator plays the animation.